#ifndef ACU_PIAT_UNIMRCP_BASE64_H
#define ACU_PIAT_UNIMRCP_BASE64_H

#include <vector>
#include <string>

typedef unsigned char uchar;

static std::string base64_encode(const std::string &in) {

    std::string out;

    int val = 0;
    int valb = -6;
    for (uchar c : in) {
        val = (val << 8) + c;
        valb += 8;
        while (valb >= 0) {
            out.push_back("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[(val >> valb) & 0x3F]);
            valb -= 6;
        }
    }
    if (valb > -6)
        out.push_back(
                "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[((val << 8) >> (valb + 8)) & 0x3F]);
    while (out.size() % 4) {
        out.push_back('=');
    }
    return out;
}

static std::string base64_decode(const std::string &in) {

    std::string out;

    std::vector<int> T(256, -1);
    for (int i = 0; i < 64; i++) {
        T["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[i]] = i;
    }

    int val = 0;
    int valb = -8;
    for (uchar c : in) {
        if (T[c] == -1) break;
        val = (val << 6) + T[c];
        valb += 6;
        if (valb >= 0) {
            out.push_back(char((val >> valb) & 0xFF));
            valb -= 8;
        }
    }
    return out;
}

#endif //ACU_PIAT_UNIMRCP_BASE64_H
